Pouch for storage and dispensing of lubricating oil

Abstract

The present invention relates to a pouch for storage and dispensing of lubricating oil and comprises a back sheet heat sealed along the vertical ends to a front sheet, a base sheet heat sealed to said back and front sheets. Each of said sheets comprises a laminate of a polyester sheet adhered to a coextruded sheet comprising layers selected from high density polyethylene, low density polyethylene and linear low density polyethylene.

We claim: 
     
       1. An oil storage pouch comprising: i) a front sheet,   ii) a back sheet,   ii ) a bottom or base sheet,   iv) said front sheet securely held in a heat sealed relationship to the back sheet along the longitudinal edges thereof,   v) said base or bottom sheet securely held in a heat sealed relationship to the front and back sheets,   vi) the end of the pouch opposite said base or bottom sheet adapted to be heat sealed when the oil is disposed therein,   vii) the front, back and base sheets each comprising a polyester sheet adhered to a coextruded sheet, said polyester sheets of each of the front, back and base sheets being the outer layers of the pouch;   viii) said coextruded sheet consisting of at least two layers selected from low density polyethylene, linear low density polyethylene and high density polyethylene, each of the layers of the coextruded sheet being of a different material than each of the other layers of said coextruded sheet and wherein an inner layer of said coextruded sheet exposed at the inside of said pouch is high density polyethylene.   
     
     
       2. A pouch as claimed in claim 1 wherein the coextruded sheet comprises two layers, a first layer being said inner layer of high density polyethylene, and a second layer being selected from low density polyethylene and linear low density polyethylene. 
     
     
       3. A pouch as claimed in claim 1 wherein the coextruded sheet comprises three layers, a first layer being said inner layer of high density polyethylene, and a second and third layers, said second and third layers being selected from low density polyethylene and linear low density polyethylene. 
     
     
       4. A pouch as claimed in claim 1 wherein the polyester sheet has a minimum thickness of 12 microns. 
     
     
       5. A pouch as claimed in claim 3 wherein the low density polyethylene and linear low density polyethylene has a minimum thickness of 72 microns. 
     
     
       6. A pouch as claimed in claim 3 wherein the high density polyethylene layer has a minimum thickness of 50 microns and the low density polyethylene and linear low density polyethylene has a minimum thickness as 47 microns. 
     
     
       7. A pouch as claimed in claim 1 wherein high density polyethylene has a minimum thickness of 36 microns. 
     
     
       8. An oil storage pouch comprising: i) a front sheet;   ii) a back sheet;   iii) a bottom or base sheet;   iv) said front sheet securely held in a heat sealed relationship to the back sheet along the vertical sides;   v) said base sheet securely held in a heat sealed relationship to the front and back sheet,   vi) the upper end of the pouch adapted to be heat sealed when oil is disposed therein,   vii) the front, back, and base sheets each comprising a polyester sheet adhered to a coextruded sheet, said polyester sheets of each of the front, back, and base sheets forming the outer exposed layers of the pouch;   viii) said coextruded sheet consisting of three layers, a first layer forming an inner layer exposed at the inside of the pouch being made of high density polyethylene, and second and third layers disposed between said inner contact layer and said outer polyester sheet, one of said second and third layers being made of low density polyethylene and the other of said second and third layers being made of linear low density polyethylene.